Understanding Transformer Concepts

Front

What determines the polarity of a transformer?

Back

The direction the secondary coil is wrapped.

Front

The polarity of a transformer can be either ______ or subtractive.

Back

Additive

Front

What happens if a transformer has an impedance of 2% at full load?

Back

The secondary voltage will be limited by 2%.

Front

Prior to installation, lineworkers always refer to the ______.

Back

Nameplate

Front

If the polarity is additive, where will the x1 bushing be?

Back

On the right-hand side

Front

The oscillation of the magnetic field in respect to the core creates which type of loss?

Back

Iron loss

Front

What is the acceptable impedance range for transformers when banking or paralleling? Options: +/- 5%, +/- 7.5%, +/- 10%, +/- 12.5%

Back

+/- 7.5%

Front

CSP transformers have internal fuses that protect against ________.

Back

internal faults

Front

What is the purpose of the internal secondary breaker in a CSP transformer?

Back

To disconnect hot legs during overload

Front

What is the location of fuses in padmount transformers?

Back

Internally